Strand twisting apparatus



y 1944- A. E.'WINSLOW ,3 3,10

' I STRAND TWISTING' APPARATUS Filed Oct. 29, 1943 '2 Sheets-Sheet 1 INENTOR iI/erfi. .z'ns/ow Patented July 4, 1944 STRAND TWISTING APPARATUSAlbert E. Winslow, Mystic, Conn., assignor to Atwood Machine Company, acorporation Connecticut Application October 29, 1943, Serial No. 508,131

2 Claims.

' This invention relates to a device for the twisting of strand materialand more particularly to a device adapted to impart more than one turnof twist to one or more strands for each revolution of the fiyer.

In such a device the package or packages from which the strand materialis supplied do not partake of the revolution of the flyer. The strandsare drawn from the supply package or packages in a manner to form aloop,which is carried by a fiyer around the package or packages.Assuming the supply package to be mounted on a stationary axis, twoturns of twist are imparted for each revolution of the loop about thepackage. The manner in which the supply package support is heldstationary while mounted upon a rotating spindle with the yarn Fig. 3 isa sectional view on substantially line 33 of Fi 2.

The invention illustrated in this application forms an alternativearrangement of a part of alarger machine which is shown in my co-pendingapplication Serial No. 517,859. The supply packages are des.'gnated I0from which the strands of material ll lead into the hollow spindle thendownwardly together and radially outwardly as looping about the supplypackage has been accomplished in various ways and it is the means bywhich this result is accomplished which is the feature of thisinvention.

One of the objects of this invention is to provide a simple andeflicient manner of holding the supply package support substantiallystationary while being mounted upon the revolving spindle which rotatesthe strands about the package support.

Another object of this invention is to provide a friction drive throughthe fiyer from a stationary frame to the supply package support whichwill orovide suificient friction to prevent slip between the drivingparts.

Another object of this invention is to utilize centrifugal force whichis developed by a rotatior. of the flyer for maintaining a drivingconnection between the fiyer and the stationary part and the creel orsupply package support.

Another object of this invention is to provide an arrangement so thatthe greater the spindle speed the greater the frictional drivingconnection will be between the flyer and its operating parts.

With these and other objects in view, the invention consists of certainnovel features of con at l2 and thence upwardly as at I3 to loop thestrands upon themselves, which loop is revolved about the axis of thespindle so that two turns of twist or lay are placed into the strandsfor each single turnthat the loop makes about the spindle. The upwardlyextending run of the work I3 is then guided from the machine through thering l4 and between feed rolls I5 and I6 and thence led as at I! overpulley l8 and over suitable guides l9 and to be packaged as at M, thepackage being operated by a surface drive 22 as diagrammatically shownin Fig. 1.

The spindle 25 (as shown in Fig. 2) is rotatably mounted by means ofball bearings 26 inlthe bolster 21 and casing 28 which is carried by astationary part 29 consisting of the framework of the machine in whichit is mounted. The

spindle is driven by a whirl 30 which is fixed to the spindle by meansof the set screw 31. An arm 32 supports an annular race 33 at one sidewhich is also supported by the bolt 34 at the other side which race isconcentric with the spindle.

A creel designated generally 35 has a hub portion 36 and a plate 31extending outwardly there: from upon which a plurality of rods 38 arecarried for the support of packages ID of strand material. Rods 40 alsosimilarly supported extend adjacent. the packages to serve as a guideabout which this material is led prior to entering the hollow spindle.This creel or supply package support 35 is rotatably mounted upon thespindle by means of ball bearings the lower one of which 4| is shown inFig. 2, which engages a shoulder 43 on the spindle. The lower portion ofthe creel 35 is flanged as at 44 which provides an inner annular raceway45. concentric with the spindle.

A flyer designed generally 46 is formed with a hub portion 41 fixedlymounted upon the spindle to rotate therewith while a plate 48 engagesthe upper end of this hub 41 and extends outwardly therefrom tosupport-the reel or pulley 23 over which the strand material extends. Arecess 49 is provided for the reception of the other guide In each blockthere is provided a bore 55 for the reception of a shaft 55 which isrotatably mounted in this bore as a bearing. At the lower end of theshaft 56 a friction wheel 51 is provided which engages the annular race33 while at the upper end of the shaft there is a friction wheel 58which engages the annular race 45. Thus, as the flyer 66 rotates thefriction wheel 51 will be driven by its engagement with the annular race33 to turn the shaft 56. Turning the shaft 56 will turn the frictiondisk 58 which will in turn drive the creel by its engagement with theannular race 45 in the opposite direction. The annular races 33 and '45are the same in diameter and also the friction disks 56 and 58 are thesame in diameter. Thus, the annular surface 65 will remain always in thesame relation to the annular surface33 unless some slip occurs. Theannular surface'33 is on a stationary part and accordingly althoughrotation of the-shaft 56 occurs the annular surface :35 will maintainthe creel stationary or in its same relative position to the stationarypart 32, 33 and regardless of the speed of rotation of the flyer thesupporting creel will remain stationary.

The friction caused by centrifugal force throwing the several blocks 52and their drives outwardly plus the spring 53 which assists thismovement will provide a firm and sumcient driving connection so as toprevent any slipping of the parts.

Iclaim:

2,358,104 I I 1. In a strand twisting device, a spindle, a supplypackage support with respect to which the spindle is rotatable, anannular race carried by and fixed with relation on said support, asecond annular race stationary with respect to said spindle, aflyer'carried by said spindle for re'volving in a plane between theplanes of said races, a radially slidable block carried by the flyer andpositioned to be revolved about said spindle and thrown outwardly bycentrifugal force as rotation'occurs, a shaft rotatable in said block, a

pair of rotatable drive members rotatable with said shaft one beingengageable with one race and the other being engageable with the otherrace to have driving relation therewith whereby centrifugal force willincrease the frictional engagement between said drive members and races,and means independent of centrifugal force yieldingly urging saidrotatable members into engagement with said races.

2. In a strand twisting device, a spindle, a supply package support withrespect to which the spindle is rotatable, a plurality of annular racescarried by and fixed with relaiton on said support, a plurality ofsecond annular races stationary with respect to said spindle, a flyercarried by said spindle for revolving in a plane between the planes ofsaid races, a plurality of ra- 4 diaily slidable blocks carried by theflyer in equally an'gularly spaced relation and positioned to berevolved about said spindle and thrown outwardly by centrifugal force asrotation occurs; a shaft rotatable in said block, a pair of rotatabledrive members rotatable with each of said shafts one being engageablewith one race and the other being engageable with the other race to havedriving relation therewith whereby centrifugal force will increase thefrictional engagement between said drive members and races, and acompression spring engaging each of said blocks tending to move the sameradially outwardly independently of centrifugal force.

ALBERT E. WINSLOW.

